We in #Udacity on irc.freenode.net definitely are :) !
You can join via webchat if you don't have an IRC client yet: http://webchat.freenode.net/?channels=udacity
You can join via webchat if you don't have an IRC client yet: http://webchat.freenode.net/?channels=udacity
Just started the Crypto course and it's paced really well, I like it.